| 摘要 |
PURPOSE: A forest fire flame spread speed predicting method is provided to quickly suppress a forest fire by using a result predicting a forest fire flame spread speed through the analysis of the heat transmission, inclination, and height of flames. CONSTITUTION: The length of flames generated during the combustion of a fuel layer formed of segments is calculated by using a heat emission rate of the layer (S403). An angle of the flames is calculated by using the length of the flames (S404). A spread speed of the flames is calculated by using the length, the angle, a result calculating heat emitted from the flames, a result calculating heat received from the segments, and a result calculating heat lost from the segments (S405). [Reference numerals] (AA) Start; (BB,DD) No; (CC,EE) Yes; (FF) End; (S401) Read required data from defined resident data and measured data; (S402) Set initial configuration; (S403) Calculate the length of flames; (S404) Calculate the angle of flames depending on wind and slope; (S405) Calculate the spreading speed of flames; (S406) Do flames from the segments defined at the early stages of spreading reach the last segment?; (S407) Check the calculated result and store; (S408) Calculate the time for flames to reach the last segment? |
